Re: st: rologit and mfx

I am trying to calculate marginal effects from coefficients estimated using -rologit-. However, when I type in -mfx- after the rologit command, I get the following error message:
predict() expression unsuitable for marginal effect calculation
I played around with other options after "mfx" but get the same message every time. I'm using Intercooled 9.0, in case that matters.
Any suggestions?